<template>
<!-- 搜索栏 -->
  <div class="search-container">
<!-- 搜索栏 -->
<form action="/">
  <van-search
    v-model="searchText"
    show-action
    placeholder="请输入搜索关键词"
    background="#3296fa"
    @search="onSearch"
    @cancel="onCancel"
    @focus="isResultShow = false"
  />
</form>
<!-- 搜索结果 -->
<search-result v-if="isResultShow"
:search-text="searchText"
/>
<!-- 联想建议 -->
<search-suggestion
v-else-if="searchText"
:search-text="searchText"
@search="onSearch"
/>
<!-- 搜索历史记录 -->
<search-history v-else
:search-histories="searchHistories"
@Clear-search-histories="searchHistories = []"
@search="onSearch"
/>
  </div>
</template>

<script>
import SearchHistory from './components/search-history'
import SearchSuggestion from './components/search-suggestion'
import SearchResult from './components/search-result'
import { setItem, getItem } from '@/utils/storage'
export default {
  name: 'SearchIndex',
  // path: '/search',
  components: {
    SearchHistory,
    SearchSuggestion,
    SearchResult
  },
  data () {
    return {
      searchText: '',
      isResultShow: false, // 控制搜索结果的的展示
      searchHistories: getItem('TOUTIAO_search_histories') || [] // 搜索历史记录
    }
  },
  methods: {
    onSearch (val) {
    // 更新文本框内容
      this.searchText = val

      // 存储搜索历史记录
      // 要求：不要有重复历史记录，最新的排在最前面
      const index = this.searchHistories.indexOf(val)
      if (index !== -1) {
        this.searchHistories.splice(index, 1)
      }
      this.searchHistories.unshift(val)

      // 渲染搜索结果
      this.isResultShow = true
    },
    onCancel () {
    //   console.log('onCancel')
      this.$router.back()
    }
  },
  watch: {
    searchHistories (value) {
      setItem('TOUTIAO_search_histories', value)
    }
    // searchHistories () {
    // handler () {}
    // }
  }
}
</script>

<style scoped lang="less">
.search-container {
// padding-top: 1px;
.van-search__action {
color: #fff;
}
.search-form {
position: fixed;
top: 0;
left: 0;
right: 0;
z-index: 1;
}
}
</style>
